Machine for rethreading fruit-jar rings



March 11, 1924.

v 1,486,736 T. J. FOSTER MACHINE FOR RE'IHREADING FRUIT JAR RINGS Filed Feb. 7. 1922 2 Sheets-Sheet 1 INVENTOR 77am: :1: ibstex BY i w ATTORNEY Patented Mar. 11, 1924.

'NITED STATES THOMAS J. FOSTER, 0F GUELPH, ONTARIO, CANADA.

MACHINE FOR RETHREADING FRUIT-JAR RINGS.

Application filed February 7, 1922. Serial No. 534,823.

To all whom it may concern.

Be it known that I, THOMAS J. FosrnR, a citizen of the Dominion of Canada, residing at Guelph, in the county of Wellington and Province of Ontario, Canada, have invented certain new and useful Improvements in of which the following is a specification.

The present invention relates to a machine for rethreading preserving jar rings and the principal object is to provide an apparatus of the character described which is simple of construction and operation and which will efficiently and quickly form the corrugations or threads on the jar closure rings.

A further object of the invention is to provide a device which is capable of regulation to form threads or corrugations of dif ferent gauge or depth, to accommodate jar threads of difierent sizes.

With these and other objects in view, the invention consists in the construction, combination and arrangement of parts as will be hereinafter described, illustrated in the accompanying drawings, and pointed out in the claims hereunto appended.

Figure 1 is a perspective view of the improved machine, illustrating the same in operation.

Fig. 2 is a similar View with the detent element in inoperative position.

Fig. 3 is an elevational view of the grooved roller detached from the machine.

Fig. 4 is a similar view of the inserting roller, and

Fig. 5 is a detail View of the holding element for the machine.

Referring to the drawings, like numerals designate like parts in the various drawings.

Due to the manufacture of jar closure rings, of relatively soft metal, the threads quickly become distorted, which renders the rings useless, as the same will not bind the closure plate tightly against the jar opening to hermetically seal the contents of the jars.

With the obviation of this defect in view, I have provided a device comprising a hori zontal frame 5, formed at its ends with upwardly directed stationary arms .6 and 7 and a downwardly and outwardly disposed bracket 8, interposed between the said arms 6 and 7. The short arm 6 is bifurcated as at 9 and the upper ends of the arm bifurcations are formed with registering openings in which is rotatably mounted a shaft 10.

The relatively long arm 7 at its upper end Machines for Rethreading F ruit-J ar Rings,

is enlarged as at 11 and this enlargement is bifurcated and provided with registering openings in which is mounted a pin shaft 12. This pin 12 passes through the enlarged end 13 of a movable arm 14, and serves to hold the arm 14 in pivotal relation on the stationary arm 7.

The opposite end of the movable arm 14 is formed with downwardly extending b1- furcations 15, which latter carry a pin 16 on which is mounted an inserting roller 17. A grooved roller 18 is mounted on shaft 10, which latter is formed with a crank portion 19 and handle 20.

The frame 5 centrally of its upper part is formed with an annular lug 21, which latter is recessed for the lower end of a bolt 22, the upper end of which is screw threaded at 23.

The movable arm 14 is likewise intermediate its length formed with lug portions 24 and 25, through which extend an opening 26. Bolt 22 is secured within the opening in lug 21 of the frame 5 by a pin 27, and when the arm 14 is in the position illustrated in Fig. 1, the bolt 22 will have its upper end disposed within the opening 26 of the movable arm 14.

The device is secured to a table or platform by means of a clamp screw 28 passing through the horizontal portion 29 of bracket 8.

hen the device is in position upon the table or platform support, the clamp screw 28 is adjusted and the movable arm 14 is moved over on its pivot 12 and bolt 22 is inserted in the arm opening 26. The closure ring 30 is then inserted between the rollers 17 and 18 and prior to the threading operation a wing nut 31 is screwed upon the upper threaded end 23 of bolt 22, which forces the arm 14 downwardly to hold roller 17 against the closure 30. A spring 32 is coiled around bolt 22 and has its lower end secured to pin 27 while its upper end engages the lug 25 on the movable arm 14.

In this manner, the ring 30 is tightly held between the inserting and grooved rollers 17 and 18. g

The roller 17 has its peripheral edge surface rounded as at 33, while roller 18 is formed with a groove 34, which registers with the rounded edge surface 33 of roller 17.

When the handle 20 is actuated, shaft 10 is revolved together with roller 18. This motion is imparted to the jar ring to be threaded, and as it is disposed between the said rollers 17 and 18, threads are impressed thereinto.

It is obvious that rings with distorted threads may be rethreaded or new rings formed with threads.

By adjusting the wing nut 31, to dispose the arm 14 against the tension of spring 32, the depth of the threads may be regulated. From the foregoing, it is thought that the construction of my invention will be clearly understood, and, therefore, a more extended explanation has been omitted.

Having thus described the invention, what I claim is new, is:

. 1. A rethreading apparatus for jar closure rings, comprising a frame, said frame formed with vertical arms one of which is of less length than the other and bifurcated, a bracket member formed on said frame, a clamp screw carried by said bracket member, a member hingedly mounted on one of said arms and having depending bifurcated portion, a roller revolvable in the bifurcation of said member, a roller mounted in the bifurcation of the short arm of said frame, the first mentioned roller formed with a convexed outer edge portion, the other of said rollers formed with a peripheral groove registering with the edge por tion of the said first mentioned roller, a bolt connected to said frame and extending through said hingedly-mounted member, and a spring arranged 011 said bolt for tensioning the rollers into engagement with the ring to be threaded.

2. A rethreading apparatus for jar closure rings, comprising a frame, said frame formed with vertical arms one of which is of less length than the other and bifurcated, V

a bracket member formed on said frame, a clamp screw carried by said bracket member, a member hingedly mounted on one of said arms and having depending bifurcated portion, a roller revolvable in the bifurcation of said member, a roller mounted in the bifurcation of the short arm of said frame, the first mentioned roller formed with a convexed outer. edge portion, the other of said rollers formed with aperipheral groove registering with the edge portion of the said first mentioned roller, a bolt connected to said frame and extending through said hingedly-mounted member, a spring arranged on said belt for tensioning the rollers into engagement with the ring to be threaded, and a handle connected to the frame roller for actuating both of said rollers and the ring.

In testimony whereof I aflix my signature in the presence of two witnesses. THUS. J. FOSTER.

lVitnesses:

Fnnomc YVA'r'r, WM. GRAsLnY. 

